Article
Chemistry, Physical
Yin Yin, Guanyong Wang, Chen Liu, Haili Huang, Jiayi Chen, Jiaying Liu, Dandan Guan, Shiyong Wang, Yaoyii Li, Canhua Liu, Hao Zheng, Jinfeng Jia
Summary: A moire superlattice has been discovered in topological insulators, showing a periodic modulation on the electronic structure. This study demonstrates that the rotation angles between Sb2Te3 film and graphene substrate can be strongly influenced by substrate temperature, leading to different moire patterns with varying levels of complexity. Comparing dI/dV curves from Sb2Te3 films with different moire patterns suggests that the superstructure can provide degrees of freedom in modifying electronic structure, stimulating further research on the moire modulation in topological insulators.
Article
Multidisciplinary Sciences
Mohammed J. Karaki, Xu Yang, Archibald J. Williams, Mohamed Nawwar, Vicky Doan-Nguyen, Joshua E. Goldberger, Yuan -Ming Lu
Summary: By applying external perturbations such as magnetic/electric fields and mechanical strains, topological magnons in magnetically ordered crystals can be predicted and discovered, providing an ideal platform for engineering low-dissipation spintronics devices.
Article
Chemistry, Inorganic & Nuclear
Mingze Li, Zhenhua Wang, Dan Han, Xudong Shi, Tingting Li, Xuan P. A. Gao, Zhidong Zhang
Summary: The coexistence of bulk electronic band gap and gapless surface states in topological insulators (TIs) offers new opportunities for optoelectronic devices. In this study, we synthesized vertical Sb2Te3 nanoplate film on n-type Si substrates and demonstrated its photodetection response. The small bulk bandgap and surface states conduction of Sb2Te3 lead to effective light absorption and photocarrier transport, resulting in significant photoresponse over a wide spectral range.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Ying Yang, Jianhua Wang, Ying Liu, Yuting Cui, Guangqian Ding, Xiaotian Wang
Summary: In this study, seven different crystal structures of Cs-Te binary systems were discovered using symmetry analyses and first-principles calculations. These systems can host various symmetry-enforced topologically nontrivial phonons, such as Dirac point phonons, Weyl point phonons, quadratic contact triple point phonons, and nodal line phonons. The relationship between crystal structure and topological properties was thoroughly investigated, and the Cs-Te binary systems exhibited phononic surface states suitable for experimental detections.
Article
Chemistry, Multidisciplinary
P. R. Parmar, S. J. Khengar, Disha Mehta, Yogesh Sonvane, P. B. Thakor
Summary: This study examines the photovoltaic performance of van der Waals heterostructure (v-HS) PtS2/ZrS2 using density functional theory based on first-principle calculations. The most stable configuration of v-HS PtS2/ZrS2 is identified based on adhesion energy and phonon dispersion relation. The results show that v-HS PtS2/ZrS2 has enhanced absorption and improved photovoltaic performance compared to its constituent monolayers PtS2 and ZrS2.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Subarna Das, P. Singha, Ramzy Daou, Oleg Lebedev, Sylvie Hebert, Antoine Maignan, Aritra Banerjee
Summary: Te-impurity-incorporated Sb2Te3 composites were synthesized, and the doping of Te and suppression of Te vacancies resulted in a lower carrier concentration and an increased Seebeck coefficient. Despite the increase in electrical resistivity due to Te impurities, the charge carrier mobility remained stable due to enhanced lattice texturing. The addition of Te also led to strong phonon scattering, reducing the thermal conductivity and achieving a high ZT value.
PHYSICAL REVIEW MATERIALS
(2022)
Article
Chemistry, Physical
Zhong Chen, Mingxiang Xu
Summary: In this study, the magnetoresistance (MR) and Shubnikov-de Haas (SdH) oscillation in topological Sb2Te3 were investigated. The results showed obvious anisotropy in angle-dependent MR and revealed the presence of a nontrivial Berry phase. It was also found that Sb vacancies can introduce an additional band, leading to anisotropic Fermi surfaces and magnetoresistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Physics, Multidisciplinary
Adewale H. Pasanaje, Abdullah A. AlShaikhi
Summary: In this study, graphene was contacted with monolayer MoSSe in two ways, resulting in n-type and p-type Schottky contacts. The type of contact and barrier height were found to be influenced by layer thickness, with tunable barrier heights observed. Strain-induced Schottky to Ohmic transitions were observed in the study.
EUROPEAN PHYSICAL JOURNAL PLUS
(2021)
Article
Nanoscience & Nanotechnology
Minghui Xing, Zelong Qiao, Ziqiang Niu, Shitao Wang, Zhiping Liu, Dapeng Cao
Summary: This study synthesizes the NiTe/Ni2P heterostructure and demonstrates the strain engineering of NiTe/Ni2P through the lattice incompatibility between the phosphide and the telluride. The strain engineering significantly enhances the oxygen evolution reaction (OER) activity and stabilizes the catalyst's intrinsic structure. Notably, a voltage-dependent phase transition appears during the OER, which is different from most previously reported Ni-based catalysts. Density functional theory calculations reveal that the tensile strain of Ni2P inhibits the irreversible phase transitions of Ni(2)P into NiOOH. Overall, this work presents a new approach for designing high-performance OER catalysts using strain nanotechnology.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Priya R. Baral, Victor Ukleev, Thomas LaGrange, Robert Cubitt, Ivica Zivikovic, Henri k M. Ronnow, Jonathan S. White, Arnaud Magrez
Summary: Researchers have successfully synthesized octahedral particles of the chiral insulating skyrmion host Cu2OSeO3 using a chemical method, and discovered the relationship between particle size and the stability of topological spin textures.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Multidisciplinary Sciences
F. H. Yu, D. H. Ma, W. Z. Zhuo, S. Q. Liu, X. K. Wen, B. Lei, J. J. Ying, X. H. Chen
Summary: The competition between superconductivity and CDW state in the pressurized kagome lattice of CsV3Sb5 displays complex effects, with unexpected double-peak behavior observed under high pressure conditions.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Taowen Xue, Kewei Tang, Weihong Qi, Yaru Wei, Guoliang Ru
Summary: The beta-tellurene vdWHs formed with monolayer graphitic SiC (g-SiC) and MoS2 exhibit promising semiconductor properties for potential applications in photocatalytic water decomposition and electronic devices. The electronic structures and optical properties of the heterostructures can be tuned by applying in-plane uniaxial strain, showing a potential for designing 2D electronic and photoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Physical
Sandeep Kumar Verma, Sanjay Sharma, Gyanendra Kumar Maurya, Vidushi Gautam, Roshani Singh, Ajeet Singh, Kavindra Kandpal, Pramod Kumar, Arun Kumar, Claudia Wiemer
Summary: Topological insulators have emerged as promising candidates for novel electronic and optoelectronic devices due to their unique properties. In this study, Sb2Te3 and Bi2Te2Se materials and their heterostructure were fabricated, and their electronic and optical properties were investigated computationally. The materials showed broad light absorption ranges and exhibited nontrivial properties.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
H. Khan, M. U. Ashraf, M. Idrees, H. U. Din, Chuong Nguyen, B. Amin
Summary: Using first principles calculations, this study investigates the electronic band structure and Schottky contact properties of CS-MX2 and CS-MXY MS vdWH. The results show that the electronic band structures of CS-MX2 and CS-MXY MS vdWH can be considered as a simple sum of CS, MX2, and MXY monolayers, with the electronic properties of these layers well-preserved in the vdWH. Furthermore, CS-WS2 and CS-MoSeTe exhibit smaller effective mass and therefore hold promising prospects for nanoelectronic and optoelectronic devices.
Article
Chemistry, Inorganic & Nuclear
Tahani A. Alrebdi, M. Idrees, F. H. Alkallas, B. Amin
Summary: The research on photocatalytic water splitting and optoelectronics has garnered significant attention due to the pressing issues of energy and the environment. This study employs hybrid first principle calculations to investigate the electronic structure, optical properties, and photocatalytic response of strained Janus MXY and Arsenene (Are) monolayers, as well as their van der Waals heterostructures (vdWHs) with Are-MXY (M = Mo, W; (X =6 Y) = S, Se, Te). The findings suggest that these vdWHs possess characteristics suitable for water splitting at pH = 0.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Energy & Fuels
Shuai Zhang, Zhenhua Wu, Zekun Liu, Yongbo Lv, Zhiyu Hu
Summary: This study presents a multiscale nanomaterial prepared by in situ polymerization of polyaniline nanoparticles on porous anodic aluminum oxide membrane. The nanomaterial exhibits broadband solar absorption and offers a platform for efficient photothermal conversion.
Article
Chemistry, Physical
Zhenhua Wu, Shuai Zhang, Zekun Liu, Erzhen Mu, Zhiyu Hu
Summary: Thermoelectricity is a green technology that converts thermal energy into electricity, playing a vital role in addressing global warming. Recent advancements in thermoelectric materials and devices have enabled various applications such as sensors, temperature control, and desalination. Efforts are being made to further improve material performance, optimize device design, and explore new application scenarios for uninterrupted power generation.
Article
Materials Science, Ceramics
Tianpeng Liu, Xiaoshuang Li, Kang Zhang, Shuwei Deng, Zhiyu Hu, Hongxiang An, Bo Wang, Youchao Kong
Summary: In this study, manganese-based magnetoplumbite-type La(Zn,Mn)Al11O19 phosphors were successfully synthesized and a narrow green emission band at approximately 518 nm was observed in LaZnAl11O19 host with Mn2+ doping equal to 0.3. Temperature dependent photo-luminescence experiments showed excellent thermal stability in LaZn0.7Mn0.3Al11O19 sample, and the thermal ionization process was elaborated in detail. Finally, a high-power w-LED with high color rendering index and low associated color temperature was produced using a phosphor-in-glass (PiG) technique.
CERAMICS INTERNATIONAL
(2023)
Article
Engineering, Chemical
Zhanghua Zou, Zhiyu Hu, Hongting Pu
Summary: Polypropylene nanobelts (PPNBs) are prepared using a high-efficient nanolayer co-extrusion technique as supporting skeleton, which effectively suppresses the shrinkage of natural cellulose separators during dehydration. The cellulose fibers have optimized pore size to prevent internal short circuits. The PPNBs/cellulose composite separator (PPNBs/CS) exhibits superior porosity, ionic conductivity, thermal stability, electrolyte uptake, and tensile strength due to the synergies between PPNBs and cellulose fibers. The PPNBs/CS separator also shows better rate-performance and cycling durability in lithium-ion battery half cells.
JOURNAL OF MEMBRANE SCIENCE
(2023)
Article
Multidisciplinary Sciences
Zekun Liu, Zhenhua Wu, Shuai Zhang, Yanxi Lv, Erzhen Mu, Ruijie Liu, Dongshi Zhang, Zhuguo Li, Shibo Li, Ke Xu, Zhiyu Hu
Summary: This study demonstrates a color materials recognition system based on photothermoelectric effects, using a microfabricated thermoelectric generator as a platform. By selectively absorbing and converting light, the system distinguishes colors and materials, providing a potential approach for precise detection of color materials over wide areas.
Article
Materials Science, Multidisciplinary
Xiaoshuang Li, Tianpeng Liu, Kang Zhang, Zhiyu Hu, Hongxiang An, Shuwei Deng, Youchao Kong, Bo Wang
Summary: In this study, manganese-based magnetoplumbite-type La(Zn,Mn)Al11O19 phosphors were successfully synthesized and characterized. The LaZn0.7Mn0.3Al11O19 and LaZn0.2Mn0.8Al11O19 phosphors exhibited the highest emission intensity under excitation at 450 nm, with maximum quantum efficiencies of 99% and 55% respectively. An anomalous near-infrared emission band at approximately 730 nm was observed for LaZnAl11O19 with heavy Mn2+ doping, attributed to Mn2+-Mn2+ dimers. These findings not only provide a viable strategy for synthesizing innovative NIR phosphors, but also contribute to the development of high-power photonic devices.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Physics, Multidisciplinary
Zhiguo Wang, Zhiyu Hu, Yuan Zhang, Rui Zheng, Tiancong Liu, Yanpeng Zhang
Summary: Introducing vortices into an Airy beam for the first time by modulating the number of side lobes and using the EIT effect, this study investigates the formation and manipulation of Airy vortices. The movement of the vortex phase singularity can be controlled by adjusting the intensities of the lobes in the Airy beam. Additionally, changing the number of side lobes alters the energy distribution and displacement of the vortex phase singularity. These findings offer a novel approach to acquiring and adjusting Airy vortex beams, with potential applications in optical micromanipulation.
ANNALEN DER PHYSIK
(2023)
Review
Chemistry, Physical
Shuai Zhang, Zhenhua Wu, Zekun Liu, Zhiyu Hu
Summary: Harvesting sustainable energy from the sun and cold space to generate green electricity uninterruptedly offers a potential alternative solution to the current energy crisis and environmental issues. This emerging energy technology has made significant progress, but more challenges lie ahead.
ADVANCED ENERGY MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Siyuan Luo, Shuai Zhang, Hewei Yuan, Zhenhua Wu, Ming Li
Summary: The construction of 3D hierarchically heterostructured nanoarrays is an efficient approach for developing high-performance PEC cells for water splitting. In this study, novel 3D branched Cu2S/ZnO heterojunction nanowire arrays are fabricated as photocathodes for enhanced PEC water splitting. The 3D Cu2S/ZnO NWAs demonstrate improved light trapping ability and higher photocurrent density compared to pristine Cu2S NWAs, with an optimal IPCE of 10.5% at 450 nm. The enhanced performance can be attributed to increased light absorption and stepwise band-edge structure for charge separation and transport.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Zhenhua Wu, Zhimao Wu, Haoran Lv, Wenbin Zhang, Zekun Liu, Shuai Zhang, Erzhen Mu, Hengxin Lin, Qing Zhang, Daxiang Cui, Thomas Thundat, Zhiyu Hu
Summary: This study reports on a technique of fabricating infrared light sources using nano-localized catalytic combustion, which enables wavelength tunability and enhances infrared emission by integrating nanophotonic structures.
Article
Chemistry, Physical
Zekun Liu, Shuai Zhang, Zhenhua Wu, Erzhen Mu, Hong Wei, Yan Liu, Huilie Shi, Zhiyu Hu
Summary: By improving microfabrication technology, we have successfully developed a highly integrated micro thermoelectric device (TED) with enhanced interfacial and structural qualities at a high filling factor of 61%. This micro-TED achieved an open-circuit voltage of 2.6 V and an output power of 1.2 mW with a temperature difference of 62.8 K. It can generate a temperature gradient of up to 600 K/mm and achieve a net cooling temperature of 3.6 K. As a novel microflow sensor, the micro-TED can detect ultra-slow cold/hot airflows down to 4 mm/s.
Article
Materials Science, Multidisciplinary
Jiang Tao, Hu Zhiyu, Gao Xueyun, Wang Haiyan, Sun Wenbin
Summary: Based on the Johnson-Cook model and Gruneisen equation of state, a finite element analysis model was established to simulate the penetration process of tungsten wire reinforced copper-zinc composite materials and tungsten-nickel-iron alloys into steel targets. The self-sharpening phenomenon of the composite was observed, and the influence of tungsten wire anisotropy on the penetration performance was discussed. The results showed that the stress was concentrated on the axial tungsten wire during the penetration process, resulting in reduced strength and plasticity of the composite in a certain direction.
RARE METAL MATERIALS AND ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Zhihang Wang, Zhenhua Wu, Zhiyu Hu, Jessica Orrego-Hernandez, Erzhen Mu, Zhao-Yang Zhang, Martyn Jevric, Yang Liu, Xuecheng Fu, Fengdan Wang, Tao Li, Kasper Moth-Poulsen
Summary: There is a need for compact technologies that can effectively use solar heat for power generation. The molecular solar thermal (MOST) system described here combines solution- and neat-film-based approaches to store solar energy as chemical energy and release it as heat, while also utilizing microfabricated thermoelectric generators to produce electricity when solar radiation is not available. The results demonstrate the high potential of this system to store and transfer solar power into electricity, independent of geographical restrictions.
CELL REPORTS PHYSICAL SCIENCE
(2022)
